function sample = str2double_ftn(sample)

sample.iv_prem_insurer_nstate = str2double(sample.iv_prem_insurer_nstate);
sample.iv_prem_plan_allotherstate = str2double(sample.iv_prem_plan_allotherstate);
sample.iv_prem_plan_nstate = str2double(sample.iv_prem_plan_nstate);
sample.reg_adoption_year_s_formc=str2double(sample.reg_adoption_year_s_formc);
sample.delta_n_plans_reg = str2double(sample.delta_n_plans_reg);
sample.delta_premium_reg = str2double(sample.delta_premium_reg);
sample.delta_n_insurers_reg = str2double(sample.delta_n_insurers_reg);
sample.claims_ipst_line7 = str2double(sample.claims_ipst_line7);
sample.claims_is_form5 = str2double(sample.claims_is_form5);
sample.delta_approved_cum = str2double(sample.delta_approved_cum);

sample = table2array(sample);